Yoshiji Hiraoka

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Musashino, JP

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Patents Grantslast 30 patents

Information Patent Grant
Stainproof, flame-resistant composite sheet material
- Patent number 4,714,650
- Issue date Dec 22, 1987
- Hiraoka & Co., Ltd.
- Tsutomu Obayashi
- B32 - LAYERED PRODUCTS
Information Patent Grant
Composite sheet material
- Patent number 4,686,135
- Issue date Aug 11, 1987
- Hiraoka & Co., Ltd.
- Tsutomu Obayashi
- B32 - LAYERED PRODUCTS
Information Patent Grant
Water-impermeable sheet material
- Patent number 4,312,907
- Issue date Jan 26, 1982
- Hiraoka & Co. Ltd.
- Yoshiji Hiraoka
- D06 - TREATMENT OF TEXTILES OR THE LIKE LAUNDERING FLEXIBLE MATERIALS NOT OTH...